RockAuto has 'em on close-out sale at $0.71 each: R45XLS. FWIW, I usually hold off on ordering from RockAuto until I have enough that the shipping doesn't outweigh their low prices. But, plugs are light so might be a good deal even with shipping cost, since the price is certainly right. They are good about shipping fast, too.

Doug

1947 2nd-Series GMC FC152 3/4-ton
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1953 Chevy Bel Air Sport Coupe Powerglide